jsonl

ExampleWrite shows a JSON Lines round-trip: marshal a directed, weighted graph to NDJSON (one node/edge record per line) with Write, then unmarshal it back with ReadInto and confirm the structure.

package main

import (
	"bytes"
	"fmt"

	"github.com/FlavioCFOliveira/GoGraph/graph/adjlist"
	"github.com/FlavioCFOliveira/GoGraph/graph/io/jsonl"
)

func main() {
	cfg := adjlist.Config{Directed: true}

	src := adjlist.New[string, int64](cfg)
	_ = src.AddEdge("a", "b", 7)
	_ = src.AddEdge("b", "c", 9)

	var buf bytes.Buffer
	if _, err := jsonl.Write(&buf, src); err != nil {
		panic(err)
	}

	dst, records, err := jsonl.ReadInto(&buf, cfg)
	if err != nil {
		panic(err)
	}

	fmt.Println("records read:", records)
	fmt.Println("order:", dst.Order())
	fmt.Println("size:", dst.Size())
	fmt.Println("b->c:", dst.HasEdge("b", "c"))
}

Output:
records read: 5
order: 3
size: 2
b->c: true

ExampleWriteWithProps shows the labelled-property-graph round-trip: WriteWithProps emits a property record per typed property and ReadWithProps restores it, so a string property recovers its value.

package main

import (
	"bytes"
	"fmt"

	"github.com/FlavioCFOliveira/GoGraph/graph/adjlist"
	"github.com/FlavioCFOliveira/GoGraph/graph/io/jsonl"
	"github.com/FlavioCFOliveira/GoGraph/graph/lpg"
)

func main() {
	cfg := adjlist.Config{Directed: true}

	src := lpg.New[string, int64](cfg)
	_ = src.AddEdge("alice", "bob", 1)
	_ = src.SetNodeProperty("alice", "city", lpg.StringValue("Lisbon"))

	var buf bytes.Buffer
	if _, err := jsonl.WriteWithProps(&buf, src); err != nil {
		panic(err)
	}

	dst, _, err := jsonl.ReadWithProps(&buf, cfg)
	if err != nil {
		panic(err)
	}

	got, ok := dst.GetNodeProperty("alice", "city")
	city, _ := got.String()
	fmt.Println("alice has city:", ok)
	fmt.Println("alice.city:", city)
}

Output:
alice has city: true
alice.city: Lisbon